4000000625 has 20 divisors (see below), whose sum is σ = 5133522372. Its totient is φ = 3113496000.

The previous prime is 4000000619. The next prime is 4000000661. The reversal of 4000000625 is 5260000004.

It can be written as a sum of positive squares in 10 ways, for example, as 3273212944 + 726787681 = 57212^2 + 26959^2 .

It is not a de Polignac number, because 4000000625 - 2⁶ = 4000000561 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 63362 + ... + 109611.

Almost surely, 2^4000000625 is an apocalyptic number.

It is an amenable number.

4000000625 is a deficient number, since it is larger than the sum of its proper divisors (1133521747).

4000000625 is an equidigital number, since it uses as much as digits as its factorization.

4000000625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173030 (or 173015 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 17.

The square root of 4000000625 is about 63245.5581444262. The cubic root of 4000000625 is about 1587.4011346453.

Adding to 4000000625 its reverse (5260000004), we get a palindrome (9260000629).

It can be divided in two parts, 4000000 and 625, that multiplied together give a square (2500000000 = 50000²).

The spelling of 4000000625 in words is "four billion, six hundred twenty-five", and thus it is an aban number.